had black screen again on ota channels no scheduled otas recorded i have done all things suggested here ota usb lies flat, only channels with solid signals are selected We had dish tech to our home 2days ago but ota were functioning well then you never know when the black screen will appear reboot brings them back but if away for the day or weekend you cant rely on it to do ota recordings we never had this problem with 722 or 922 are we alone with this problem